Draft-rigging.



No. 741,948. PATENT'ED 00T. zo', 1603.

' H. c. WILLIAMSON. H. PRIBS.

DRAFT RIGGING.

APPLICATION FILED SEPT. 1o. 190s.

N0 MODEL. f

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' ing shown.

NITED STATES Patented October 20, 1903.

PATENT QFFICE.

HENRY C. WILLIAMSON AND HERMAN PRIES, OF MICHIGAN CITY, INDIANA.4

DR`AFT-RIGGING.

SPECIFICATION forming part of Letters Patent No. 741,948, dated October 20, 1903,

Application filed September 10, 1903. Serial No. 172.642. (No model.)

To all whom t Wzl/(Ly concern:

Be it known that we, HENRY C. WILLIAM- soN and HnRMANPRmscitizens of the United States,and residents of Michigan City,county of Laporte and State of Indiana, have invented certain new and useful Improvements in Draft-Rigging, of which the following isl a specification, and which are illustrated in the' accompanying drawings, forming a part thereof. j This invention relates to that class of draftriggingfor railway-carsin which the cushioning or bufiing springs are supplemented by friction; and its object is to simplify and increase the efficiency of devices of this character.

The invention consists of the parts and arrangement of parts as illustrated in the ac-` companying drawings, in which- Figure 1 is a side elevation of the draftrigging, a detail section of a railway-car be- Fig. 2 is a, plan section on the line 2 2 of Fig. 1. Fig. 3 is a transverse section on the line 3 3 ofFig. 2, and Fig. 4 is a similar section showing a modified form of construction.

In devices of this kind the object in View is the absorption of pressure by the combined agency of springs and frictionally engaging parts and its transmission through these agencies to the car. In the present instance the pressure applied to the springs is in part transmitted directly to the car and in part indirectly by being utilized in increasing the friction between the sliding parts.

The drawings show at 10 cross-timbers of a car and at 11 longitudinal or draft timbers, cheek-plates 12 being applied to the latter in the usual manner. A pair of followers 13 14. engage the forward and rearward shoulders of the cheek-plates and are acted upon by a draw-bar 15, having a tailpiece, shown as talr-v of sufficient length to normally reach to the end follower 14, against which this spring is seated. A plurality of friction-plates 23,pref erably segmental in form, as shown in Fig. 3, engage the peripheral face of the iange 21. These plates have their ends beveled, as shown at 25 26. A third follower 27 is interposed between Vthe plunger 19 and the spring 17 and is apertured to accommodate the stem 2O of the plunger. Preferably, though not necessarily, the face of the ,plunger engaging the follower 27, is inclined, and the aperture of the plunger is correspondngly formed.

From adjacent faces of each of lthe followers 14 and 27-there projects a circumferential flange 2S 29, the inner faces of these iianges being beveled or inclined outwardly, as shown at 30 and 31, to correspond with the bevels 25 26 of the plates 23.

The action of the device is as follows: The springs 17 18 maintain the plunger 19 and the follower 27 in contact, and there is such balance between these two sets of springs that the end of the stem 2O is prevented from contact with the follower 13. Forward draft being applied, the tail-strap 16 carries the follower 14 forward, compressing both sets of springs until the stem 2O is brought into engagement with the follower 13. Further movement of the plunger being now rendered impossible, the further compression of the spring 17 is accomplished by the movement of thefollower 27, pressure being transmitted to it through the friction-plates 23, which slide upon the peripheral face of the flange 2l. The inclined faces of the flanges 23 29 and of the friction-plates force the latter inwardly toward the plunger, thereby increasing the frictional contact be'- tween these parts in proportion to the pressure applied. Upon release of the pressure the various parts return to their normal position,the friction between the ange 2 1 and plates 23 being diminished as gradually as it was increased. The application of thrustpressure produces like results. The plunger 19 is moved inwardly,compressing the springs 17 and 18. When the follower 13 comes in contact with the end of the stem 20, the

IOO

plunger is advanced, the periphery of its `fiange 2l sliding along the inner faces of the plates 23, and the frictional'engagement of these parts is gradually increased by the wedging action of the followers 27 and 14, as

i before.

Preferably the plunger and the flanges of the followers 14 and 27 are annular in form, in which case the friction-plates take the segmental form, as shown in Fig. 3. Any other form maybe used, as, for example, shown in Fig. 4, wherein the plunger 22 and the follower 32 are shown as square and the friction-plates 24 as fiat.

We claim as our inventionl. In a draft-rigging, a pair of followers each having a peripheral flange having its inner face beveled, segmental plates having correspondingly beveled ends and interposed between the followers, a plunger having its peripheral face in sliding engagement with the inner faces of the segmental plates, a spring reacting between the plunger and one of the followers, a stem projecting from the plunger loosely through the other follower, a third follower, and a spring reacting between thethird follower and the apertured follower.

2. In a draft-rigging, in combination, a pair of followers having their adjacent faces inwardly beveled, plates having beveled ends tted to the beveled faces of the followers, a plunger fitting loosely through one of the followers and having its periphery in sliding engagement with the plates, a spring reacting between the plunger and the other follower, a third follower, and a spring reacti-ng between the same and the apertured follower.

3. In a draft-rigging, in combination, a longitudinally-reciprocating plunger, frictionplates engaging the periphery of the plunger, relatively approachable followers having wedging engagement with the outer faces of the plates, and an expansion-spring for separating the followers.

raices 4. In a draft-rigging, in combination, a longitudinally-reciprocating plunger, frictionplates engaging the peripheral face of the plunger, means for advancing the plunger, and means for forcing the plates toward the plunger.

5. In a draft-rigging, in combination, a central member, friction-plates in sliding engagement with the side faces thereof, followers connected with the central member and plates so as to move them longitudinally in relatively opposite directions and having a compressive wedgin g engagement with plates.

6. In a draft-rigging, in combination, front and rear followers, a member between the followers, springs interposed between the followers, friction-plates engaging the peripheral surface of such intermediate member, means for moving the plates and the intermediate member relatively in opposite directions, and means for moving the plates toward the intermediate member.

7. In a draft-rigging, in combination, a pair of end followers, an intermediate plunger, a pair of springs reacting respectively between each follower and the plunger, a stem projecting from the plunger toward one of the followers but normally not contacting therewith, a peripheral flange extending from the opposite face of the'plunger, a follower engaging the face of the plunger and having an aperture for its stem, peripheral flanges extending from adjacent faces of the last-named follower and the end follower adjacent the plunger-flange, such follower-flanges having their inner faces oppositely inclined, 'and friction-plates interposed between the followeranges and bearing against the peripheral flange of the plunger-flange.

HENRY C. WILLIAMSON. HERMAN PRIES.

Witnesses:

GEO. P. ROGERS, SAMUEL J. TAYLOR. 

